MotionShineFree online calculators, with the working shown.
Scientific, graphing and everyday calculators for school, money, health and building. Each one works out the answer as you type.
47 free calculators
Free, no sign-up, in your browser.
PPI calculator
How sharp a screen is.
Aspect ratio calculator
Find the ratio of a size, image or video, and a new size that keeps it.
Bitrate and file size calculator
Work out a file size from the bitrate, or the bitrate for a size limit.
Unit converter
Exact factors, ten groups.
Scientific calculator
Trig, logs, memory, history.
Graphing calculator
Plot functions, find zeros.
Percentage calculator
Percent of, change, discount.
Fraction calculator
Mixed numbers, with steps.
GPA calculator
Weighted and cumulative GPA.
Grade calculator
What you need on the final.
Age calculator
Years, months and days.
Days between dates
Days, weeks, working days.
Hours calculator
Shifts and a weekly time card.
Tip calculator
Tip and split the bill.
Compound interest calculator
Savings with deposits, by year.
Loan calculator
Monthly payment and interest.
Mortgage calculator
With tax, insurance and PMI.
Inflation calculator
US dollars since 1913.
BMI calculator
Adult BMI with CDC categories.
TDEE calculator
Daily calories, Mifflin-St Jeor.
Concrete calculator
Cubic yards and bags.
Area and volume
16 shapes, with steps
Average calculator
Mean, median, mode and weighted average
Board foot calculator
Board feet and lumber cost
CD calculator
CD balance, APY, ladder and penalty
Countdown to date
Days, hours and seconds to any date
Credit card payoff
Debt free date and interest, many cards
Day of the year
What number day is it today
Daylight saving time
When the clocks change, any zone
Exponent calculator
Powers, roots, big numbers
Factors and primes
Factors, factor pairs and prime factors
Gas cost calculator
Trip fuel cost in mpg or L/100 km
GCF and LCM
Greatest common factor and least common multiple
Gravel calculator
Cubic yards, tons and bags
Log calculator
Log base 10, ln, any base
Matrix calculator
Matrices, inverse, RREF
Military time converter
12 hour to 24 hour, and say it
Margin calculator
Profit margin, markup and price
Remainder and modulo
Quotient, remainder and mod, with steps
Salary to hourly
Annual income to hourly, weekly, monthly
Slope calculator
Slope, line equation, graph
Square footage calculator
Add rooms, take away cut-outs
Standard deviation
Sample, population, variance, z-scores
Steps to miles
Steps to miles and km
Triangle calculator
Solve any triangle, Pythagoras
Velocity calculator
Speed, time, acceleration
Watts to amps
Also kW and kVA to amps
Guide
Which one to use.
School
GPA calculator, Grade calculator, Percentage calculator, Fraction calculator, Scientific calculator and Graphing calculator.
Money
Tip calculator, Compound interest calculator, Loan calculator, Mortgage calculator and Inflation calculator. They do the maths only; they are not financial advice.
Time, health and projects
Age calculator, Days between dates, Hours calculator, BMI calculator, TDEE calculator, Concrete calculator and Unit converter. The health calculators give estimates, not medical advice.
Questions
Good to know.
Are these calculators free?
Yes, with no sign-up. They work in your browser.
Where do the numbers come from?
Where a calculator uses outside figures, such as inflation data or BMI categories, the page names the source and the date it was read.